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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Stuart Orloff

Transplant Surgery Physician in Rochester, NY · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1790712859

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark Stuart Orloff
Sex Male
Practice address 601 Elmwood Ave, Box Surg, Rochester, NY, 14642
Phone (585) 275-5875
Fax (585) 271-7929
Enumeration date Jun 26, 2006
Last updated in NPPES Jul 3, 2023

Taxonomy & licenses

204F00000X Transplant Surgery Physician Allopathic & Osteopathic Physicians · License 186829 (NY) Primary

Other identifiers

Identifier Type State Issuer
01273743 Medicaid NY -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1790712859 active?
Yes, as of the latest NPPES snapshot, NPI 1790712859 is active (record last updated 2023-07-03).
How do I verify Mark Orloff's NPI record?
Cross-check NPI 1790712859 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-07-03.